Downdraft magazine stove and furnace.



W. CLOW.

DOWNDRAFT MAGAZINE STOVE AND FURNACE.

APPLICATION FILED SEPT. 2o. 1915.

Patented Sept. 12, 1916.

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WILLIAM GLOW, 0F INDEPENDENCE, MISSOURI.

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Specification of Letters Patent.

Patented Sept. 12, 1915.

Application filed September 20, 1915. Serial No. 51,591.

To all whom t may concern:

Be it known that I, WiLLrAM GLOW, a citizen of the United States, residing at Independence, in the county of- Jackson and State of Missouri, have invented certain new and useful Improvements in Downdraft Magazine Stoves and Furnaces, of which the following is a specication.

My invention relates to improvements in down-draft magazine stoves, furnaces, etc., and it consists in the peculiar arrangement, construction, and combination of parts, hereinafter described, and more particularly pointed out in the claims.

My object is to provide a stove of simple construction, and so arranged that the greatest efiiciency may be obtained with the least consumption of fuel.

In the accompanying drawings, Figure 1 shows a vertical central section of the stove on line I-I of Fig. 2. Fig. 2 is a plan view of the stove with the lid thereof partly broken away. Figs. 3 and 4 are horizontal sections on line III-III and IV-IV, respectively, of Fig. 1. Fig. 5 is a broken vertical section on line V-V of F ig. 2.

In carrying out the invention, I employ an outer shell 1, closed at its ends by a top 2 and a base 3, which latter is supported upon legs 4, so that air currents may pass upwardly through the stove as hereinafter described. The lower portion of the shell 1 has an opening 5 controlled by a damper (i, which may be entirely removed when it is desired to take out ashes from the ashepit 7 located beneath the grate 3. rIhe top 2 is dome-shaped to form a chamber 9, having an outlet at its rear side communicating with a pipe 10, whereby the products of combustion are carried oif.

11 designates an inner shell whereby the interior of the stove is divided into an outer chamber 12 and a hot air chamber 13, which latter' is concentrically arranged within the former. rIhe chambers 12I and 13 are divided from the ash-pit 7 and the chamber 9 by a ring 14 and a partition 15, respectively. The outer chamber 12 communicates at its lower end with the ash-pit 7 through an annular opening 16 and at its upper end with the chamber 9 through a plurality of openings 17 in the partition 15. The hotair chamber 13 communicates at its lower end with a plurality of vertical flues 18 supported by the base 3 and they in turn support the ring 14, which has openings 19,

. 32 is adjusted for down draft.

whereby communication is established between the flues and said hot-air chamber 13. The base 3 has a plurality of openings 20, communicating with the lower ends of the flues 1S to admit currents of air thereto. Hot air escapes from the chamber 13 through a plurality of openings 21 and 22 in the top 2 and the partition 15, respectively. Flues 18 are provided near their upper ends with brackets 23, whereby the grate 8 is supported in the upper portion of theash-pit 7.

24 designates a magazine located within the hot-air chamber 13 and supported upon a fire-pot 25, which in turn is supported above the grate 3 by the ring 14,.Fig. 1. Fuel is supplied to the magazine 24 through a hopper 26, depending from the top 2 and resting upon the partition 15. Said hopper 26 is normally closed by a lid 27, having inlets 28 and 29 for the admission of air, inlets 29 being controlled by a damper 30.

Communication is established between the upper end of the magazine 24 and the chamber 9 through a series of openings 31 in the partition 15, and communication through said openings is controlled by an annular valve 32, which also controls communication between chamber S) and the outer chamber 12, which latter serves as a passage for the products of combustion when the valve Said valve 32 has peripheral recesses 33 adapted to register with the openings 17, and is provided at its inner edge with recesses 34 adapted to register with the openings 31 in the partition 15, said recesses 33 and 34 be` ing so arranged that when the former register with the openings 17, the latter will be out of communication with the openings 31, as shown in Figs. 1' and 3. The annular valve 32 has segmental slots 32"L loosely encompassing the surrounding walls of the openings 21.

Valve 32 may be actuated by the lid 27 or by a handle 27a, through the intermediacy of a vertical shaft 35 journaled in the top 2 and the partition 15, a crank 36 fixed to the lower end of said shaft, and a link 37 pivotally-connected to said crank 36 and the valve 32, Fig. 3. The lid 27 is provided with a rearwardly-extending lug 38, having a square hole which loosely encompasses the cylindrical portion of the shaft 35 when said lid is seated in a recess 2a in the top 2 of the stove, but when the lid is raised from its recess 23j, preparatory to being swung to open position, the sides of the square hole in the lug 38 are brought into engagement with the square portion 35a of the shaft to rotate the same with the lid. The handle 27a also has a square hole to fit the square upper end 35a of the shaft 35, so that the same can be rotated to shift the valve 32, without opening the lid 27.

39 designates a plurality of Scrapers depending from the valve 32 into the chamber 12 to keep the adjacent walls 1 and 11 free from soot. y

In starting a fire, an up-draft is created by opening the damper 6 and establishing communication between the magazine 211 and the chamber 9 by turning the valve 32 to uncover the openings 31. After the re is well under way the draft is reversed and caused to descend through the magazine 24: and the fire-pot 25 by closing the valve 6, opening the damper 30 and adjusting the valve 32 to close the openings 3l and uncover the openings 17. As the air in the chamber' 13 becomes heated it ascends and escapes through the openings 21 and 22, and draws cold air from beneath the stove upward through the liues 18.

The currents of air passing upwardly through the chambers 12 and 13 prevent the; shells 1 and 11 from burning out and add largely to the heating capacity of the stove. When the lid 27 is opened to replenish the fuel the openings 31 are uncovered to allow the smoke to pass upwardly therethrough instead of escaping through the hopper 26 into the room containing the stove.

While I have shown the invention applied to a stove, it is obvious that it can be readily embodied in a furnace without departing.

from the spirit and scope of the invention.

I-Iaving thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. In a stove, an upper chamber having an outlet, an outer annular chamber communicating with said upper chamber, a magazine also communicating with said upper chamber, an intermediate chamber be- Copies of this patent may be obtained for'iive cents each, by addressing the Commissioner of Pa tween said outer chamber and the magazine, a fire-pot communicating with said magazine and having communication at its lower end with the outer chamber, a grate beneath said fire-pot, and a valve for alternately closing communication between the magazine and the upper chamber and between the outer chamber and said upper chamber.

2. In a stove, an upper chamber having an outlet, an outer chamber communicating with said upper chamber, a magazine also communicating with said upper chamber, a fire-pot communicating with said magazine and the outer chamber, a grate beneath said fire-pot, a hopper extending through the upper chamber and communicating with the magazine, a lid upon said hopper provided with inlets for the admission of air, a damper to control said inlets, a valve for alternately closing communication between the magazine and the upper chamber and between the outer chamber and said upper chamber, and means connecting said valve to the lid whereby the latter actuates the former.

3. In a stove, an ash-pit in the lower portion thereof and outlets in its upper portion, a ring' at the top of the ash-pit, a fire-pot supported by said ring, a magazine supported by said lire-pot, a shell supported by the ring and surrounding the fire-pot and the magazine to form a hot-air chamber communicating with the outlets in the upper portion of the stove, and inlet flues supporting the ring and communicating at their upper ends with the hot-air chamber.

et. In a stove of the character described, two concentric chambers, an upper chamber communicating with one of said concentric chambers, a valve for controlling such communication, and Scrapers depending from said valve to keep the adjacent walls of the concentric chambers clean.

In testimony whereof I aHiX my signature, in the presence of two witnesses.

WILLIAM- CLOVV.

Witnesses:

F. Gr. FISCHER, L. J. FISCHER.

tents,

Washington, D. C. 

